package cn.cloud.all.security.oauth2.common.util;

import org.codehaus.jackson.JsonParseException;
import org.codehaus.jackson.JsonParser;
import org.codehaus.jackson.JsonProcessingException;
import org.codehaus.jackson.map.DeserializationContext;
import org.codehaus.jackson.map.JsonDeserializer;

import java.io.IOException;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;

/**
 * JSON deserializer for Jackson to handle regular date instances as timestamps in ISO format.
 *
 * @author Dave Syer
 */
public class JsonDateDeserializer extends JsonDeserializer<Date> {

    private static final SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss.SSS'Z'");

    @Override
    public Date deserialize(JsonParser parser, DeserializationContext context) throws IOException, JsonProcessingException {
        try {
            synchronized (dateFormat) {
                return dateFormat.parse(parser.getText());
            }
        } catch (ParseException e) {
            throw new JsonParseException("Could not parse date", parser.getCurrentLocation(), e);
        }
    }
}